{"id":"value", "text":"value", "parent":"value"}

$.ajax({
    url: "/category",
    dataType: 'json',
    type: 'GET',
    success: function (res) {
        $.each(res, function (i, obj) {
            products.push([obj.id, obj.parent, obj.text]);
            $('#jstree_demo_div').jstree({
                'core': {
                    'data': [{ "id": obj.id, "parent": obj.parent != 0 ? obj.parent : "#", "text": obj.text }]
                }
            });
            console.log(obj.parent != 0 ? obj.parent : "#");
        });

    }
});

var objJS = new Object();
 objJS .id = ObjectJason.id;
 objJS .parent = ObjectJason.parent!=="0" ?  ObjectJason.parent:"#";
 objJS .text = ObjectJason.text;

$('#jstree_demo_div').jstree({
                'core': {
                    'data': Array ;
                }
            });